// Copyright (c) 2022 Proton Technologies AG
//
// This file is part of Proton Technologies AG and ProtonCore.
//
// ProtonCore is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// ProtonCore is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with ProtonCore. If not, see https://www.gnu.org/licenses/.

import Foundation

final class Atomic<Value> {

    private let queue = DispatchQueue(label: "ch.proton.atomic_queue")
    private var _value: Value

    init(_ value: Value) {
        self._value = value
    }

    var value: Value {
        queue.sync { self._value }
    }

    func mutate(_ transform: (inout Value) -> Void) {
        queue.sync {
            transform(&self._value)
        }
    }

}
